Press.



J. C. PIDDYMENT.

PRESS. APPLICATION FILED JULY s. 1911.

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JOHN C. FIDDYMEN T, OF BALTIMORE, MARYLAND.

PRESS.

Specification of Letters Patent.

Patented Aug. 5, 1913.

Application led J'uly 3, 1911. Serial No. 636,775.

To all whom z't may concern Be it known that I, JOHN C. FIDDYMENT, a citizen of the United States, residing at Baltimore, in the State of l\i'[aryland.lhave invented certain new and useful improvements in Presses, of which the following is a specification. f

The present invention relates in general to presses of that type which are designed to be employed for extracting the juices, liquid, or oil from any material containing the same, such as cotton seed, castor beans, nuts, fish, brewers and packing house products and the like.

More particularly, the invention relates to novel and improved means adapted to be employed in connection with screw presses to o-vercome the tendency of the mass of material to rotate with the screw, and consequently to check ,any retrograde or creeping movement of the material backward toward the feeding end of the machine. Most materials that are to be pressed to extract oil or moisture are soft or semi-plastic and have not a sufficient consistency to admit of the screw taking hold of the material and forcing it positively through the press with a uniform movement, and the object of the present invention is the provision of a novel form of bafile which cooperates with the expressing screw to prevent the material from creeping back or turning with the screw vin such a manner as to interfere with the proper compression of the material within the press and to prevent the requisite amount of material being introduced at the feed end of the press. In this connection, it may be mentioned that the amount of material introduced into the feed end of the press governs the pressure therein, so that unless a proper amount of material is fed into the press the pressure required for a proper expressing action will not be present.

This improvement is intended to insure the press getting the material in the properI amount, and to regulate the flow of the material through the pressure chamber from inlet to outlet in such a manner as to provide foi` and maintain a uniform expressing action throughout the machine, and for this-purpose a rotary baffle is provided which fits between adjacent convolutions of the spiral fiange or thread of the expressing screw so as to prevent the material from creeping around the screw and working its way backward, although there is little or no resistance to the proper passage of the material through the press chamber from the feed end of the machine to the discharge end thereof.

In carrying out the invention, the same is necessarily susceptible to a wide range of structural modification without departing from the principle or sacrificing any of the advantages of the-invention, although certain simple and practical embodiments of the invention are illustrated in the accompanying drawings, in which Figure l is a horizontal sectional view through a screw press constructed in accordance with the invention. Fig. 2 is a vertical transverse sectionalv view through the same on the line 2 2 of Fig. 1. Fig. 3 is a detail view of a portion of the expressing screw and a modified form of the rotary bafiie member. Fig. 4 is a transverse sectional view through a portion of a screw press, showing a still further modification in which a screw is provided for feeding/the material to the press and one of the rotary baflie members is mounted in cooperative relation to the screw, and Fig. 5is a detail view of the gearing between the screw and baffle member, in the modification shown by Fig. t.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters.e

The invention is particularly designed to be employed in connection with a screw press which may be of any conventional or approved construction.

As indicated upon the drawing, the numeral l designates the expressing screw which is arranged within the casing 2, the i695 ends of the screw being suitably journaled within the boxes 3. The screw is of the usual construction and is formed with a tapering body or drum la which gradually increases in size from the receiving end of the press chamber to the discharge or delivery end thereof, the said body being provided with a spiral flange or thread l" which fits closely -Within the cylindrical interior of the casing 2. As the screw is revolved the flange lb is designed to act in the usual manner tomove the material lon-y; gitudinally through the press chamber', and

owing to the fact that the space between the interior walls of the casing 2 and the body la of the screw gradually decreases llt) toward the discharge end of the press, the

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material will be subjected toa gradually increasing pressure as it' is advanced through the machine, the maximum pressure being attained immediately before the discharge of the material. llthe casing 2 has a perforate construction to admit of the ready escape of the juices or oils extracted from the material as it is subjected to the squeezing action of the press. This casing 2 may be conveniently constructed, as is shown upon the drawing, by ,assembling a series of rings 2 in a spaced relation to each other so as to provide annular cracks or crevices atl close intervals throughout the length of the press for the escape of the liquid squeezed from the material.

Owing to the fact that most materials which are ordinarily subjected to the action of a press of this character are all of a soft or semi-plastic nature, it has been found that there is a tendency for the material to turn with the screw or creep backward around the same so as to interfere with the proper act-ion of the press. ln order to obviate this difiiculty it is contemplated to employ a rotary tapered baule member which will t between various convolutions of the spiral flange so as to prevent retrograde or backward movement of the material. As indicated on Fig. 1 there are two of these rotary baffles 4t arranged within a pocket 5 formed in one side of the casing 2, the said baffles being mounted upon a single shaft 6 which is parallel to the axis of the lt will be observed that the said pocket 5 is an oE-set of the casing which is formed by ring sections of double construction, as plainly shown in the-sectional view, or Fig. 2 of the drawings, that is to say, these particular ring sections have an upper ring member to accommodate the receiving end of the expressing screw, and a lower ring member communicating with the interior of the upper ring member and conforming to and accommodating the rotary baille.

The inner end of the shaft 6 is journaled upon the casing at 7, while the outer end of the shaft is suitably journaled within a box 8 and is provided with a pinion 9 meshing with a similar pinion 10 carried by the screw 1. lEach of the rotary baffles l has a spiral formation and fits closely between a pair of adjacent convolutions of the flange 1b of the expressing screw. When the expressing screw is turned, any suitable means being provided for this purpose, the shaft 6 and baffles t are simultaneously turned in an opposite direction, and the spiral formay tion of the battles causes them to conform to the movements of the -screw so as'to always provide a check or baffle to prevent the material within the press from creeping backward around the screw.

A slight modification is shown in Fig. 3

Locator.

in which va single baille member la is employed, although the said baffle is considerably longer than in the previous instance and is formed with several spiral convolutions or flights which fit 'between corresponding convolutions of the flange 1b of the expressing screw. Owing to the fact that as the material is .moved through the press the juices or oil are gradually extracted therefrom, it becomes more solid or dense as it approaches the discharge end of the press, so that ordinarily it is merely necessary to place the batlies at or near the feed end of the press, the expressing screw being capable of taking hold of the material and properly pushing the same through the press after a portion of the liquid has been expelled therefrom. -lt is for this reason that the rotary bafe members are shdwn in Fig. 1 as located adjacent the feed end of the press.

A further modication of the invention is shown in Fig. 1 in which the feed opening 11 in ascrew press 12 communicates witha tubular casing 13 having a screw member 14 mounted therein. The upper end of this screw member is provided with a pinion 15 which meshes with a smaller pinion 16 upon the upper end of a countershaft'l' which 1s arranged parallel to the axis of the screw and is provided with a rotary spiral batie member 18. rlhis baffle member 18 is ar ranged within a pocket 19 in one side of the tubular casing 13 and engages the screw 14 in such a manner as to prevent the material within the casing 13 revolving with the screw or creeping backward around the same. rfhe upper end of the tubular casing 13 is formed with a feed opening 20 through which material is designed to be fed to the screw, the said screw operating in the usual manner t0 take hold of the material and carry it down'V into the press 12.

From the foregoing description it will be obvious that the essence of the invention resides in the provision of a battle member which is designed to have a continuous rotary movement and engages the spiral iiange of the expressing screw so that the material can be advanced through the casing by the action of the screw without any material increased resistance thereof, although it is rendered impossible for the materialto creep backward `around the screw or have any retrograde movement. Under some conditions a series of these rotary battle members may be utilized, as indicated upon Fig. 1, while under other conditions a single baille member may be found sucient, as indicated in Fig. 3, the number, size, and proportions of the baffle member varying according to the nature of the material being operated upon or the individual ideas of the person using the press.

Having thus described the invention, what Va perforate casing of uniform\ diameter throughoutfan expressing screw extending through the casing from end to end and yhaving a tapered body, v and arotary spiral hallle member .arranged 'i at one side of the screw at the material-receiving end of the casing and having a geared connection with the screw, said baille following the taper of the screw body and/ projecting between flights of the screw to the full depth of Vthe space between said llights, the screw and the baliie coperating to compel the advance of the material through the press toward the outlet and preventlng retrograde creeping of the material.

2. In a screw press, the combination of a casing, an expressing screw conforming to the interior of the casing and operating in close relation thereto, the space between the spiral anges of th'escrew,l the body of the screw, and the'casing, formlng a spiral compression chamber the-cross section of which 1s gradually reduced toward the discharge Vend', one of the wallsfof said spiral compression'v chamber having openings for the escape ofluids expressed, and a rotary spiral bale having its anges extending into the spaces between the screw flanges and filling said spaces in a partof the screw inclosed by the casing and closing the receiving end of the spiral compression chamber.

3. In a screw press, the combination of a casing, an expressing screw conforming to the interior of the casing and operating in close relation thereto, the space between the spiral flanges of the screw, the body of the screw, and the casing, forming a spiral compression chamber, the cross section of which is gradually reduced toward the discharge end, one of the walls of said spiral compression chamber having openings for the escape of fluids expressed, and a rotary spiral balile having its axis parallel with the axis ofthe screw and having its anges extending into the spaces between the screw flanges and filling-said spaces in a part ofthe expressing screw inc osed by thecasing and closing the receiving end of the spiral compression chamber.

In testimony whereof I hereunto alix my signature in the presence of two witnesses.

JOHN C. FIDDYMENT. Witnesses.:

R. C. BRADDocK, A. M. PARKINS. 

